Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
2d9579a1 SS |
2 | #include <linux/threads.h> |
3 | #include <linux/cpumask.h> | |
4 | #include <linux/string.h> | |
5 | #include <linux/kernel.h> | |
6 | #include <linux/ctype.h> | |
1b9b89e7 YL |
7 | #include <linux/dmar.h> |
8 | ||
2d9579a1 | 9 | #include <asm/smp.h> |
981c2eac TG |
10 | #include <asm/ipi.h> |
11 | #include "x2apic.h" | |
2d9579a1 | 12 | |
ef1f87aa | 13 | int x2apic_phys; |
1b9b89e7 | 14 | |
1a8880a1 SS |
15 | static struct apic apic_x2apic_phys; |
16 | ||
1b9b89e7 YL |
17 | static int set_x2apic_phys_mode(char *arg) |
18 | { | |
19 | x2apic_phys = 1; | |
20 | return 0; | |
21 | } | |
22 | early_param("x2apic_phys", set_x2apic_phys_mode); | |
23 | ||
cb214ede | 24 | static bool x2apic_fadt_phys(void) |
1b9b89e7 | 25 | { |
781674fc | 26 | #ifdef CONFIG_ACPI |
cb214ede SW |
27 | if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) && |
28 | (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) { | |
ea0dcf90 | 29 | printk(KERN_DEBUG "System requires x2apic physical mode\n"); |
cb214ede | 30 | return true; |
ea0dcf90 | 31 | } |
781674fc | 32 | #endif |
cb214ede SW |
33 | return false; |
34 | } | |
35 | ||
36 | static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id) | |
37 | { | |
38 | return x2apic_enabled() && (x2apic_phys || x2apic_fadt_phys()); | |
1b9b89e7 | 39 | } |
2d9579a1 | 40 | |
f2bffe8a TG |
41 | static void x2apic_send_IPI(int cpu, int vector) |
42 | { | |
43 | u32 dest = per_cpu(x86_cpu_to_apicid, cpu); | |
44 | ||
45 | x2apic_wrmsr_fence(); | |
46 | __x2apic_send_IPI_dest(dest, vector, APIC_DEST_PHYSICAL); | |
47 | } | |
48 | ||
a27d0b5e SS |
49 | static void |
50 | __x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest) | |
2d9579a1 | 51 | { |
2d9579a1 | 52 | unsigned long query_cpu; |
a27d0b5e | 53 | unsigned long this_cpu; |
dac5f412 | 54 | unsigned long flags; |
2d9579a1 | 55 | |
ce4e240c SS |
56 | x2apic_wrmsr_fence(); |
57 | ||
2d9579a1 | 58 | local_irq_save(flags); |
a27d0b5e SS |
59 | |
60 | this_cpu = smp_processor_id(); | |
bcda016e | 61 | for_each_cpu(query_cpu, mask) { |
a27d0b5e SS |
62 | if (apic_dest == APIC_DEST_ALLBUT && this_cpu == query_cpu) |
63 | continue; | |
2d9579a1 SS |
64 | __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu), |
65 | vector, APIC_DEST_PHYSICAL); | |
66 | } | |
67 | local_irq_restore(flags); | |
68 | } | |
69 | ||
a27d0b5e SS |
70 | static void x2apic_send_IPI_mask(const struct cpumask *mask, int vector) |
71 | { | |
72 | __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLINC); | |
73 | } | |
74 | ||
dac5f412 IM |
75 | static void |
76 | x2apic_send_IPI_mask_allbutself(const struct cpumask *mask, int vector) | |
2d9579a1 | 77 | { |
a27d0b5e | 78 | __x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLBUT); |
e7986739 | 79 | } |
2d9579a1 | 80 | |
e7986739 MT |
81 | static void x2apic_send_IPI_allbutself(int vector) |
82 | { | |
a27d0b5e | 83 | __x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLBUT); |
2d9579a1 SS |
84 | } |
85 | ||
86 | static void x2apic_send_IPI_all(int vector) | |
87 | { | |
a27d0b5e | 88 | __x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLINC); |
2d9579a1 SS |
89 | } |
90 | ||
4d08d97f | 91 | static void init_x2apic_ldr(void) |
2d9579a1 | 92 | { |
2d9579a1 SS |
93 | } |
94 | ||
9ebd680b SS |
95 | static int x2apic_phys_probe(void) |
96 | { | |
cb214ede | 97 | if (x2apic_mode && (x2apic_phys || x2apic_fadt_phys())) |
9ebd680b SS |
98 | return 1; |
99 | ||
100 | return apic == &apic_x2apic_phys; | |
101 | } | |
102 | ||
981c2eac | 103 | /* Common x2apic functions, also used by x2apic_cluster */ |
a774635d | 104 | int x2apic_apic_id_valid(u32 apicid) |
981c2eac TG |
105 | { |
106 | return 1; | |
107 | } | |
108 | ||
109 | int x2apic_apic_id_registered(void) | |
110 | { | |
111 | return 1; | |
112 | } | |
113 | ||
114 | void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest) | |
115 | { | |
116 | unsigned long cfg = __prepare_ICR(0, vector, dest); | |
117 | native_x2apic_icr_write(cfg, apicid); | |
118 | } | |
119 | ||
120 | unsigned int x2apic_get_apic_id(unsigned long id) | |
121 | { | |
122 | return id; | |
123 | } | |
124 | ||
727657e6 | 125 | u32 x2apic_set_apic_id(unsigned int id) |
981c2eac TG |
126 | { |
127 | return id; | |
128 | } | |
129 | ||
130 | int x2apic_phys_pkg_id(int initial_apicid, int index_msb) | |
131 | { | |
132 | return initial_apicid >> index_msb; | |
133 | } | |
134 | ||
135 | void x2apic_send_IPI_self(int vector) | |
136 | { | |
137 | apic_write(APIC_SELF_IPI, vector); | |
138 | } | |
139 | ||
404f6aac | 140 | static struct apic apic_x2apic_phys __ro_after_init = { |
05c155c2 IM |
141 | |
142 | .name = "physical x2apic", | |
9ebd680b | 143 | .probe = x2apic_phys_probe, |
05c155c2 | 144 | .acpi_madt_oem_check = x2apic_acpi_madt_oem_check, |
b7157acf | 145 | .apic_id_valid = x2apic_apic_id_valid, |
05c155c2 IM |
146 | .apic_id_registered = x2apic_apic_id_registered, |
147 | ||
f8987a10 | 148 | .irq_delivery_mode = dest_Fixed, |
0b06e734 | 149 | .irq_dest_mode = 0, /* physical */ |
05c155c2 | 150 | |
08125d3e | 151 | .disable_esr = 0, |
bdb1a9b6 | 152 | .dest_logical = 0, |
05c155c2 | 153 | .check_apicid_used = NULL, |
05c155c2 | 154 | |
05c155c2 IM |
155 | .init_apic_ldr = init_x2apic_ldr, |
156 | ||
157 | .ioapic_phys_id_map = NULL, | |
158 | .setup_apic_routing = NULL, | |
a21769a4 | 159 | .cpu_present_to_apicid = default_cpu_present_to_apicid, |
05c155c2 | 160 | .apicid_to_cpu_present = NULL, |
a27a6210 | 161 | .check_phys_apicid_present = default_check_phys_apicid_present, |
d4c9a9f3 | 162 | .phys_pkg_id = x2apic_phys_pkg_id, |
05c155c2 | 163 | |
79deb8e5 CG |
164 | .get_apic_id = x2apic_get_apic_id, |
165 | .set_apic_id = x2apic_set_apic_id, | |
05c155c2 | 166 | |
9f9e3bb1 | 167 | .calc_dest_apicid = apic_default_calc_apicid, |
05c155c2 | 168 | |
f2bffe8a | 169 | .send_IPI = x2apic_send_IPI, |
05c155c2 IM |
170 | .send_IPI_mask = x2apic_send_IPI_mask, |
171 | .send_IPI_mask_allbutself = x2apic_send_IPI_mask_allbutself, | |
172 | .send_IPI_allbutself = x2apic_send_IPI_allbutself, | |
173 | .send_IPI_all = x2apic_send_IPI_all, | |
174 | .send_IPI_self = x2apic_send_IPI_self, | |
175 | ||
05c155c2 | 176 | .inquire_remote_apic = NULL, |
c1eeb2de YL |
177 | |
178 | .read = native_apic_msr_read, | |
179 | .write = native_apic_msr_write, | |
0ab711ae | 180 | .eoi_write = native_apic_msr_eoi_write, |
c1eeb2de YL |
181 | .icr_read = native_x2apic_icr_read, |
182 | .icr_write = native_x2apic_icr_write, | |
183 | .wait_icr_idle = native_x2apic_wait_icr_idle, | |
184 | .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle, | |
2d9579a1 | 185 | }; |
107e0e0c SS |
186 | |
187 | apic_driver(apic_x2apic_phys); |